题解 | #统计作答次数#
统计作答次数
https://www.nowcoder.com/practice/45a87639110841b6950ef6a12d20175f
with exam_cnt as ( select count(distinct exam_id) exam_cnt from exam_record where submit_time is not null ) select count(start_time) total_pv , count(submit_time) complete_pv , (select exam_cnt from exam_cnt) complete_exam_cnt from exam_record